Along with the wealth tax, these revenue-based fines also pushes you to minimize the revenues that you declare to the state, ending with overall losses in collected taxes.
For example, many crypto-bros are insanely poor on paper.
Companies can spend on behalf of a person, etc.
A more fair system is to be able to pick between jail or community service.
Time is equally precious to all humans and giving some of your time to repair your mistakes is the best you can do.